$ git clone -n https://src.fedoraproject.org/rpms/xdrawchem.git /var/lib/mock/f45-build-38718-727/root/chroot_tmpdir/scmroot/xdrawchem
Cloning into '/var/lib/mock/f45-build-38718-727/root/chroot_tmpdir/scmroot/xdrawchem'...
$ git fetch origin 4d38ed101e7646035341c907ec44d99b2a061ac8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xdrawchem
 * [new ref]         4d38ed101e7646035341c907ec44d99b2a061ac8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4d38ed1 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild