$ git clone -n https://src.fedoraproject.org/rpms/libtomcrypt.git /var/lib/mock/f45-build-17127-496/root/chroot_tmpdir/scmroot/libtomcrypt
Cloning into '/var/lib/mock/f45-build-17127-496/root/chroot_tmpdir/scmroot/libtomcrypt'...
$ git fetch origin 1feed6485d84ce87e6243d476360d56897b61f5d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libtomcrypt
 * [new ref]         1feed6485d84ce87e6243d476360d56897b61f5d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1feed64 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild