$ git clone -n https://src.fedoraproject.org/rpms/python-mnemonic.git /var/lib/mock/f45-build-31628-654/root/chroot_tmpdir/scmroot/python-mnemonic
Cloning into '/var/lib/mock/f45-build-31628-654/root/chroot_tmpdir/scmroot/python-mnemonic'...
$ git fetch origin 1544fe0cce87bf75519578c16057b786bcc63519:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-mnemonic
 * [new ref]         1544fe0cce87bf75519578c16057b786bcc63519 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1544fe0 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild