$ git clone -n https://src.fedoraproject.org/rpms/perl-Acme-Alien-DontPanic2.git /var/lib/mock/f45-build-21554-586/root/chroot_tmpdir/scmroot/perl-Acme-Alien-DontPanic2
Cloning into '/var/lib/mock/f45-build-21554-586/root/chroot_tmpdir/scmroot/perl-Acme-Alien-DontPanic2'...
$ git fetch origin bbea86502247d87de56143600d52df4e32e2418c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Acme-Alien-DontPanic2
 * [new ref]         bbea86502247d87de56143600d52df4e32e2418c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bbea865 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild