$ git clone -n https://src.fedoraproject.org/rpms/perl-Sysadm-Install.git /var/lib/mock/f45-build-26619-618/root/chroot_tmpdir/scmroot/perl-Sysadm-Install
Cloning into '/var/lib/mock/f45-build-26619-618/root/chroot_tmpdir/scmroot/perl-Sysadm-Install'...
$ git fetch origin 8ad1c04d8d6a1cf2306bf3afcf4a49c0b022b46a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Sysadm-Install
 * [new ref]         8ad1c04d8d6a1cf2306bf3afcf4a49c0b022b46a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8ad1c04 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild