$ git clone -n https://src.fedoraproject.org/rpms/qt5-qtimageformats.git /var/lib/mock/f40-build-2259123-54366/root/chroot_tmpdir/scmroot/qt5-qtimageformats
Cloning into '/var/lib/mock/f40-build-2259123-54366/root/chroot_tmpdir/scmroot/qt5-qtimageformats'...
$ git fetch origin 04c73f9dfbbd30998091ca4a8dd223a4573d45ea:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt5-qtimageformats
 * [new ref]         04c73f9dfbbd30998091ca4a8dd223a4573d45ea -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
Updating files:  71% (10/14)
Updating files:  78% (11/14)
Updating files:  85% (12/14)
Updating files:  92% (13/14)
Updating files: 100% (14/14)
Updating files: 100% (14/14), done.
HEAD is now at 04c73f9 5.15.12