$ git clone -n https://src.fedoraproject.org/rpms/keyring-ima-signer.git /var/lib/mock/f45-build-39635-750/root/chroot_tmpdir/scmroot/keyring-ima-signer
Cloning into '/var/lib/mock/f45-build-39635-750/root/chroot_tmpdir/scmroot/keyring-ima-signer'...
$ git fetch origin 16145e1784dd3e7aca2623d06667ce7ef72c4dc7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/keyring-ima-signer
 * [new ref]         16145e1784dd3e7aca2623d06667ce7ef72c4dc7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 16145e1 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild