$ git clone -n https://src.fedoraproject.org/rpms/guestfs-tools.git /var/lib/mock/f38-build-side-42-init-devel-765500-27716/root/chroot_tmpdir/scmroot/guestfs-tools
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-765500-27716/root/chroot_tmpdir/scmroot/guestfs-tools'...
$ git fetch origin d7252037d3df5ddb82efb2395bb63626e4412272:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/guestfs-tools
 * [new ref]         d7252037d3df5ddb82efb2395bb63626e4412272 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d725203 New upstream stable version 1.50.1