$ git clone -n https://src.fedoraproject.org/rpms/qbootctl.git /var/lib/mock/f45-build-33873-674/root/chroot_tmpdir/scmroot/qbootctl
Cloning into '/var/lib/mock/f45-build-33873-674/root/chroot_tmpdir/scmroot/qbootctl'...
$ git fetch origin 3103a7faeb1d49780529a05fde7a9276deba8583:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qbootctl
 * [new ref]         3103a7faeb1d49780529a05fde7a9276deba8583 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3103a7f Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild