$ git clone -n https://src.fedoraproject.org/rpms/python-krb5.git /var/lib/mock/f45-build-31315-651/root/chroot_tmpdir/scmroot/python-krb5
Cloning into '/var/lib/mock/f45-build-31315-651/root/chroot_tmpdir/scmroot/python-krb5'...
$ git fetch origin 4773a752c18e524814fbb199435f38376661dfd8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-krb5
 * [new ref]         4773a752c18e524814fbb199435f38376661dfd8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4773a75 Bump version of cython required to whats in Fedora 45/rawhide