$ git clone -n https://src.fedoraproject.org/rpms/curl.git /var/lib/mock/f40-build-2235185-53420/root/chroot_tmpdir/scmroot/curl
Cloning into '/var/lib/mock/f40-build-2235185-53420/root/chroot_tmpdir/scmroot/curl'...
$ git fetch origin 7d149f66f5cb4d9b9af3d383835889f3b7753a15:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/curl
 * [new ref]         7d149f66f5cb4d9b9af3d383835889f3b7753a15 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7d149f6 new upstream release - 8.5.0